the measure's headed to president obama. he's expected to sign it. cnn's brian todd takes a closer look at this controversial foreign intelligence surveillance act. >> reporter: he ordered it just after 9/11, and it became one of the most controversial tactics used by former president george w. bush and his security team to fight the war on terror. the secret wiretapping without warrants of communications between u.s. residents and people overseas suspected of being terrorists. it drew fire because sometimes the communications of innocent americans got caught up. in 2008, the practice was authorized by congress but with limitations. a warrant is now required to target an american, including americans who are abroad. but it's still a hugely controversial program, and the senate's just approved a five-year extension of it. it'll be signed by president obama. >> something with an enormous potential for abuse given the rather ugly history of the use of intelligent surveillance for illegitimate political purposes. >> julian sanchez believes there are stil